Driving gear of machines for casting stereotype plates



c. WINKLER 1,810,875

DRIVING GEAR OF MACHINES FOR CASTING S TEREOTYPE PLATES Filed Sept. 17, 1929 2 Sheets-Sheet 1 Win/d Cal-l C. WINKLER June 16, 1931.

DRIVING GEAR 0F MACHINES FOR CASTING STEREOTYPE PLATES Filed Sept. 17, 1929 2 Sheets-Sheet v uw NTOR Y car/maxi AWORNEYS Patented June 16, 1931 UNITED STATES.

PATENT oral-c1:

CARL WINKLER, OF BER-N, SWITZERLAND, ASSIGNOR WIN'KLOR MAT'ERA & STEREO A. Gr., OF GLABUS, SWITZERLAND, A 'CQRPORATION 'OF 'SWQET'ZERLANDY DRIVING GEAR OF MACHINES FOR-CASTING STEREQTYPE PLATES Application filed September 17, 192-9, Serial No.

I} closed through suitable intermediate mechanical elements, such as crank mechanism, is rotated by means of a crank arm fixed on same, with which a second crank is connected which is rotated by a motor.

In a drive of this kind the two connected cranks are arranged at such an angle relative to each other that, at the moment in which the mould is opened, the driven crank arm fixed on the shaft is turned through a smaller angle by a larger angular movement of the driving crank.

The advantage obtained by this arrangement is that the matrix is separated from the newly cast plate more gently by the initial slow opening motion of the mould.

This device can be combined with a mechanism for imparting to the driving crank a. slower motion at the moment 'in which the mould is being opened. For this purpose the motor can rotate the driving crank through the agency of two elliptical gears meshing with each other.

In the accompanying drawings the invention is illustrated by way of example.

Fig. 1 is a side elevation of a machine provided with my invention a portion of the upper structure being omitted, the mould being shOWn in the closed position.

Fig. 2 is a similar view showing the mould open.

Figs. 3, 4 and 5 are diagrams showing the essential parts in different angular positions.

The mould consists of the core a and bed I). The core a is carried by a frame d pivoted to the furnace walls at 0, while the bed I) is moved up and down, guided by theslots e in the frame at, by connecting rods f actuated by the crank-shaft g in a manner well known in the art. .011 one end of the crank shaft 9 is fastened a crank arm it having a' crank pin it, which engages in the slotted arm 2'. The axis 70 of this arm 2' rotates in a fixed bearing k (Fig. 3), while the crank shaft g is journalled in the frame (Z swingaeaave, and'in Germany September 17, .1928.

nig about the axis 0.. The slotted arm 2' is rotatedby the .motor Z through suitable gearing including the elliptical gears'm, n.

In the position in. which the mould a, b is closed .(Figs. 1 and 3) theshaftg lies over thea xisic and the crank pin it is then near-' est to the axis/c of the slotted crankorarm z'.

Consequently by the rotation of the slotted arm 2' the crank armah is rotated slower than in any otherangular positionL .By the Totation of the slotted arm z'theibed bis therefore moved away from the core a,.s'lo-wly at first and then with continuously increasing speed, up to the middle .of the stroke, in which cranks h,z' arriveat the ,relative'position shown in Fig. ifThereafter the speed of the bed Z) decreasesv again until it reaches the entirely open ,position (Fig. 21), the corresponding position .of-the cranks Ihfl} being shown in Fig. 5,. During the opening motion of the mold the frame cl turns about the axis 0,.s0 that the crank shaft g" moves into another position relative ,to :the" axis is, as shown in Figs. 2.and-'5. i r 1 In the position illustrated in Figs. 1 and 3, in which the mould is beginning to open,

a short radius of the elliptical gear m is opposite to a larger radius of the elliptical gear a. Consequently, in this relative angular position of the elliptical gears the angular motion of the shaft is least.

The combined actions of the velliptical gears m, n, slotted arm 2', and crank arm h, at the moment of opening the mould, sum up to such a point that the matrix is very slowly pealed off the cast plate without the total time occupied by the casting operation being increased. 7

NVhat I claim and desire to secure by Letters Patent of the United States is:

1. A driving gear for opening and closing the mold of machines for casting stereotype plates, comprising in combination a shaft, mechanism connected with said shaft for raising and lowering the mold-bed, a crank, carrying a crank pin, fixed on said shaft, a drivingcra'nk connected with said first crank and turning about an axis eccentric to said first shaft and arranged at such an angular position in regard to said first crank that at the moment of opening the mould a larger angular movement of said driving crank produces a'smaller angular movement of said first crank.

2. A driving gear for opening and closing the mould of machines for casting stereotype plates, comprising in combination a shaft, mechanism connected with said shaft for raising and lowering the mold-bed, acrank, carrying a crank pin, fixed on said shaft, a driving slotted crank arm engaging the pin of said first crank and turning about an axis eccentric to said first shaft and arranged at such an angular' position in regard to said first crank that at the moment of opening the mold a larger angular movement of said driving crank produces a smaller angular movement of said first crank;

3. A driving gear for opening and closing the mold of machines for casting stereotype plates, comprising in combination a shaft, mechanism connected with said shaft for raising and lowering the mold bed, a crank, carrying a crank pin, fixed on said shaft,

a driving crank connected with said first crank and turning about an axis eccentric to said first shaft and arranged at such an angular position in regard to said first crank thatat the moment of opening the mould a larger angular movement of said driving crank produces a smaller angular movement of said first crank, and elliptical gears meshing together at such an angular position that by the action of said gearsthe opening of the mould is caused to take place at a still slower rate.

In testimony whereof I have signed my name to this specification.

CARL WINKLER.

CERTIFICATE OF CORRECTION.

Patent No. 1, 810, 875. Granted June 16, 1931,10

CARL WINKLER.

It is hereby certified that the name of the assignee in the above numbered patent was erroneously written and printed as "Winklor Matera 8: Stereo. A. G.

whereas said name should have been written and printed as Winklor Materh & Steree A. G., as shown by the records of assignments in this office; and that the said Letters Patent should he read with this correction therein that the same may cenferm to the record of the case in the Patent Office.

Signed and sealed this 22nd day of September, A. D. 1931.

M. J.. Moore, (Seal) Acting Commissioner of Patents 

